Digital-analogue transformer

The present invention provides a digital-analogue transformer that can include a voltage divider, a decoder, a switch, a voltage adder and an output voltage controller. A digital-analogue transformer according to the present invention can increase resolution by inserting an interpolation voltage between the divided voltages generated from a resistor string, can modify a swing width of an output voltage by placing an amplifier using a feedback RC parallel circuit on an output stage, can protect a circuit from 'glitch' according to a switching operation by connecting a capacitor to a resistor string and voltage input terminals, and can reduce an offset difference generated from respective channels by having each of the respective digital-analogue transforming channels share a reference voltage generator and a bias voltage generator. The present invention can be applied to a digital-analogue transformer of a resistor string type.